基于独立分量分析算法的医疗电子设备辐射电磁干扰EMI噪声分析方法  

The Radiated EMI Analysis Method for Electromedical Equipments Based on ICA

作　　者：赵阳[1] 夏欢[1] 邱晓晖[2] 宋百通 陈雪丽[1] 

机构地区：[1]南京师范大学(江苏省电气装备电磁兼容工程实验室),南京210042 [2]南京邮电大学,南京210042

出　　处：《电工技术学报》2015年第17期180-190,共11页Transactions of China Electrotechnical Society

基　　金：江苏省自然科学基金(BK2011789);毫米波国家重点实验室开放基金(K201309);江苏省科技厅产学研究联合创新资金(BY2012004)资助项目

摘　　要：针对多辐射源医疗电子设备的辐射EMI噪声,提出了基于独立分量分析算法的分析方法。采用独立分量分析(Independent Component Analysis,ICA)算法处理医疗电子设备中多辐射源叠加的近场辐射时域信号,得到多个独立的共模/差模辐射源,找出引起辐射噪声超标的源头,即可对该元器件实施针对性的整改措施。相较于目前的多辐射源分析方法,此方法能更准确快速地找出症结所在,较为容易操作和实现。采用双共模混合源、双差模混合源和共差模混合源3种模型进行实验,结果验证了该方法的可行性,最后将此方法应用于医疗电子设备,其结果成功验证了该方法的有效性,此项研究对今后的复杂电子设备溯源方法和多辐射源整改有积极参考意义。Aiming at the multi-point electromagnetic interference（ EMI） radiation of the medical electronic equipment,this paper designs the analysis method based on the independent component analysis（ ICA）algorithm. The near field time-domain signals,resulted from the superposition of multiple radiation sources,can be separated into several independent common mode and differential mode（ CM / DM） radiation sources by applying the ICA algorithm. After the over standard sourceis found, technicians can take the corresponding improvement measures. Comparing to the present analysis methods,this one is more convenient and simple. It can quickly locate the over standard source and is easy to be manipulated and realized. In this paper, with three experiments,i. e. the double CM mixed source,the double DM mixed sources,and the CM / DM mixed source,the feasibility of the method is verified. And the validity of the method is tested by the application example in the electronic medical equipment. In the meantime, this method may offer a reference for tracing source in the complex electronic equipment and multiple radiation sources improvements in the future.

关 键 词：独立分量分析 辐射噪声 电磁干扰 分析方法 

分 类 号：O441.4[理学—电磁学]